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WorksheetsElectricity and Currents
Total questions: 55
Worksheet time: 55mins
Name
Class
Date
1.
What is the electrical charge of a proton?
a)
positive
b)
negative
c)
neutral
2.
What is the electrical charge of a electron?
a)
postive
b)
negative
c)
neutral
3.
What is the electrical charge of a neutron?
a)
positive
b)
negative
c)
neutral
4.
The law of electric charge states that....
a)
only positive charges are attracted to each other
b)
opposite charges attract each other and like charges repel each other
c)
opposite charges repel each other and sometimes attract each other
d)
only negative charges are attracted to each other
5.
the sum of kinetic and potential energy
a)
mechanical
b)
solar
c)
nuclear
d)
chemical
e)
thermal
6.
energy of movement
a)
kinetic
b)
potential
7.
also known as stored energy
a)
kinetic
b)
potential
8.
stored in chemical bonds and released in chemical reactions
a)
mechanical energy
b)
chemical energy
c)
potential energy
d)
kinetic energy
e)
solar energy
9.
What is solar energy?
a)
energy that can bring you to the sun
b)
energy carried by electromagnetic radiation from the sun
c)
energy that makes the sun become hot and bright
d)
form of energy that will not work if there is a moon
10.
energy generated by the formation of new atoms
a)
mechanical energy
b)
nuclear energy
c)
potential energy
d)
kinetic energy
e)
solar energy
11.
nuclear fission
a)
new atoms are made when smaller atoms collide and fuse
b)
new atoms are made when larger atoms are split
12.
nuclear fusion
a)
new atoms are made when smaller atoms collide and fuse
b)
new atoms are made when larger atoms are split
13.
Thermal energy is also known as ______.
a)
heat
b)
coldness
c)
biomass
d)
movement
14.
The kinetic energy of the moving water turns the turbine of a _________ to generate electrical energy.
a)
systematic
b)
electric system
c)
river system
d)
generator system
15.
___ are made of special materials that transform solar energy into electrical energy.
a)
wind cells
b)
air cells
c)
photovoltaic cells
d)
solar cells
16.
all are other ways to generate electric energy except one
a)
wind systems
b)
use of photovoltaic cells
c)
thermal energy
d)
hydroelectric systems
e)
breaking rocks
17.
How does a capacitive touch-sensitive screen work on a tablet?
a)
The pressure from a touch command completes an electrical pathway.
b)
When the user's finger touches the screen, a tiny electrical charge passes through it to complete an electrical pathway.
c)
The pressure from a touch command generates a magnetic field.
d)
When the user's finger touches the screen, a flexible plastic expands and contracts.
18.
Thermal energy is generated through the rapid motion of the particles that make up an object. Based on this description, what other type of energy could thermal energy be classified as?
a)
potential energy
b)
kinetic energy
c)
mechanical energy
d)
chemical energy
19.
Which of the following types of energy is released by forming new atoms?
a)
nuclear energy
b)
chemical energy
c)
atomic energy
d)
formation energy
20.
Which of the following statements is true about energy?
a)
It can be created.
b)
It can be destroyed.
c)
It can be transformed.
d)
All of the above.
21.
Which of the following is true of photovoltaic cells?
a)
They are made of thin layers of quartz crystals.
b)
They generate electrical energy when visible light strikes them.
c)
They generate electrical energy when any type of electromagnetic radiation strikes their surface.
d)
They can only be used to run small devices, like calculators.
22.
Charging a material by rubbing is called charging by ______.
a)
rubbing
b)
protons
c)
friction
d)
electrons
23.
charge of protons
a)
positive
b)
negative
24.
charge of electrons
a)
positive
b)
negative
25.
Which is always true of an object that is electrically neutral?
a)
It has more protons than electrons.
b)
It has more electrons than protons.
c)
It has an equal number of protons and electrons.
d)
It has no protons or electrons.
26.
A ____ is anything that supplies electrical energy.
a)
source
b)
conductor
c)
circuit
d)
insulator
e)
resistance
27.
There are two types of cell. A ___ contains a moist paste as a electrolyte, the _____ has electrodes that sit in a liquid solution.
a)
wet;dry
b)
dry;wet
c)
dry;dry
d)
wet;wet
28.
The quantity used to measure a unit of charge passing through a source is _____.
a)
electircity
b)
electrical potential difference
c)
current
d)
electric shock
29.
type of material that allows electrical charges to pass through it
a)
insulator
b)
battery
c)
switch
d)
conductor
30.
moving charges are called an electric ____
a)
current
b)
system
c)
office
d)
charge
31.
a material through which electrical charges cannot travel at all is ____
a)
insulator
b)
battery
c)
switch
d)
conductor
32.
ability of a material to allow electrical charges to pass through is called ___
a)
currency
b)
insulatority
c)
conductivity
d)
electricity
33.
What is always true of an object that is electrically charged?
a)
It has more protons than electrons.
b)
It has more electrons than protons.
c)
It has an unequal number of protons and electrons.
d)
It has no protons or electrons.
34.
A device that converts electrical energy into another form of energy is a _____.
a)
load
b)
resistance
c)
source
d)
switch
35.
_____ is the degree to which the flow of current is hindered.
a)
load
b)
resistance
c)
switch
d)
source
36.
When a source, load, and a conductor are connected in a way that allows current to flow, you have a _____.
a)
circuit circle
b)
electric circuit
c)
short circuit
d)
circuit guide
37.
What happens in a short circuit?
a)
The current gets very high because there is no load.
b)
The current cannot flow because there is no source.
38.
What is the formula for finding the resistance?
a)
R=VI
b)
R=I+R
c)
R=V/I
d)
R=V-I
39.
Resistance is measured in units called ____
a)
volts
b)
ohms
c)
amperes
40.
What is measured in amperes?
a)
resistance
b)
current
c)
electrical potential difference
41.
The symbol V means volts and is used to measure ____
a)
resistance
b)
current
c)
electrical potential difference
42.
Which of the following is an example of a source?
a)
light bulb
b)
switch
c)
electrical outlet
d)
battery
43.
Which of the following is an insulator?
a)
glass
b)
aluminum
c)
silver
d)
copper
44.
Which of the following has the highest conductivity?
a)
piece of wood
b)
rubber balloon
c)
plastic toy
d)
stainless steel fork
45.
The symbol I represents
a)
current
b)
electrical potential difference
c)
resistance
d)
conductivity
46.
Why can a short circuit be dangerous?
a)
The current can get so high that the conductor can get hot enough to start a fire.
b)
The voltage can get so high that the conductor can get hot enough to start a fire.
c)
The current can get so high that the insulator can get hot enough to start a fire.
d)
The voltage can get so high that the insulator can get hot enough to start a fire.
47.
Which of the following pairs are matched correctly?
a)
volt - resistance
b)
ampere - resistance
c)
ohm - electrical potential difference
d)
ampere - current
48.
Which is the correct statement of Ohm's Law?
a)
V=I/R
b)
V=IR
c)
V=R/I
d)
V=R+I
49.
In a ____ current can flow along one path.
a)
series circuit
b)
parallel circuit
50.
negative charges
a)
cation
b)
anion
51.
Which of the following is true of series circuits?
a)
They are impractical for wiring a building.
b)
They cannot carry enough current to run appliances.
c)
They are unsafe to use in a building.
d)
None of the above.
52.
positive charges
a)
cation
b)
anion
53.
In a ____ there is at least one branch point where the current splits into two or more pathways.
a)
series circuit
b)
parallel circuit
54.
uncharged materials are
a)
electrically neutral
b)
electrically charged
55.
charged materials are
a)
electrically neutral
b)
electrically charged
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